Solution : https://service.sap.com/sap/support/notes/929398 (SAP Service marketplace login required)
Key words : 
sap netweaver 2004s bi            import support package 08, sapbwnews bw support package 17 netweaver'04 stack 17, \usr\sap\<portal_sid>\jc00\j2ee, sap netweaver 2004s bi, unix path /usr/sap/, support package stack reason, portal master data id, 50            import support package 17, sap enterprise portal, execute report rspor_setup
Related Notes : 
       
| 917950 | SAP NetWeaver 2004s: Setting Up BEx Web | 
| 916638 | RSPOR_SETUP: Input help is empty | 
| 916637 | RSPOR_SETUP: Short dump CX_SY_RANGE_OUT_OF_BOUNDS | 
| 872280 | SAPBINews NetWeaver 7.0 BI Support Package 08 | 
| 872277 | SAPBWNews BW Support Package 17 NW'04 Stack 17 RIN | 
| 826776 | Report RSPOR_SETUP: Error message "error get certificate" |